通过拍照或相册中获取图片，并进行裁剪操作，然后把图片显示到ImageView上。
当然也可以上传到服务器（项目中绝大部分情况是上传到服务器），参考网上资料及结合项目实际情况，
测试了多款手机暂时没有发现严重问题。代码有注释，直接贴代码：
public class UploadPicActivity extends Activity implements View.OnClickListener { private Button take_photo_btn; private Button select_photo_btn; private ImageView photo_iv; //使用照相机拍照获取图片 public static final int TAKE_PHOTO_CODE = 1; //使用相册中的图片 public static final int SELECT_PIC_CODE = 2; //图片裁剪 private static final int PHOTO_CROP_CODE = 3; //定义图片的Uri private Uri photoUri; //图片文件路径 private String picPath; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_upload_pic); initViews(); } private void initViews() { this.take_photo_btn = (Button) findViewById(R.id.take_photo_btn); this.take_photo_btn.setOnClickListener(this); this.select_photo_btn = (Button) findViewById(R.id.select_photo_btn); this.select_photo_btn.setOnClickListener(this); this.photo_iv = (ImageView) findViewById(R.id.photo_iv); } @Override public void onClick(View view) { switch (view.getId()) { //拍照 case R.id.take_photo_btn: picTyTakePhoto(); break; //选择图库 case R.id.select_photo_btn: pickPhoto(); break; } } /** * 拍照获取图片 */ private void picTyTakePhoto() { //判断SD卡是否存在 String SDState = Environment.getExternalStorageState(); if (SDState.equals(Environment.MEDIA_MOUNTED)) { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//"android.media.action.IMAGE_CAPTURE" /*** * 使用照相机拍照，拍照后的图片会存放在相册中。使用这种方式好处就是：获取的图片是拍照后的原图， * 如果不实用ContentValues存放照片路径的话，拍照后获取的图片为缩略图有可能不清晰 */ ContentValues values = new ContentValues(); photoUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values); intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, photoUri); startActivityForResult(intent, TAKE_PHOTO_CODE); } else { Toast.makeText(this, "内存卡不存在", Toast.LENGTH_LONG).show(); } } /*** * 从相册中取图片 */ private void pickPhoto() { Intent intent = new Intent(Intent.ACTION_PICK, null); intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*"); startActivityForResult(intent, SELECT_PIC_CODE); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode == Activity.RESULT_OK) { //从相册取图片，有些手机有异常情况，请注意 if (requestCode == SELECT_PIC_CODE) { if (null != data && null != data.getData()) { photoUri = data.getData(); picPath = uriToFilePath(photoUri); startPhotoZoom(photoUri, PHOTO_CROP_CODE); } else { Toast.makeText(this, "图片选择失败", Toast.LENGTH_LONG).show(); } } else if (requestCode == TAKE_PHOTO_CODE) { String[] pojo = {MediaStore.Images.Media.DATA}; Cursor cursor = managedQuery(photoUri, pojo, null, null, null); if (cursor != null) { int columnIndex = cursor.getColumnIndexOrThrow(pojo[0]); cursor.moveToFirst(); picPath = cursor.getString(columnIndex); if (Build.VERSION.SDK_INT < 14) { cursor.close(); } } if (picPath != null) { photoUri = Uri.fromFile(new File(picPath)); startPhotoZoom(photoUri, PHOTO_CROP_CODE); } else { Toast.makeText(this, "图片选择失败", Toast.LENGTH_LONG).show(); } } else if (requestCode == PHOTO_CROP_CODE) { if (photoUri != null) { Bitmap bitmap = BitmapFactory.decodeFile(picPath); if (bitmap != null) { //这里可以把图片进行上传到服务器操作 photo_iv.setImageBitmap(bitmap); } } } } } /** * @param * @description 裁剪图片 * @author ldm * @time 2016/11/30 15:19 */ private void startPhotoZoom(Uri uri, int REQUE_CODE_CROP) { Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); // crop=true是设置在开启的Intent中设置显示的VIEW可裁剪 intent.putExtra("crop", "true"); // 去黑边 intent.putExtra("scale", true); intent.putExtra("scaleUpIfNeeded", true); // aspectX aspectY 是宽高的比例，根据自己情况修改 intent.putExtra("aspectX", 3); intent.putExtra("aspectY", 2); // outputX outputY 是裁剪图片宽高像素 intent.putExtra("outputX", 600); intent.putExtra("outputY", 400); intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString()); //取消人脸识别功能 intent.putExtra("noFaceDetection", true); //设置返回的uri intent.putExtra(MediaStore.EXTRA_OUTPUT, uri); //设置为不返回数据 intent.putExtra("return-data", false); startActivityForResult(intent, REQUE_CODE_CROP); } /** * @param * @description 把Uri转换为文件路径 * @author ldm * @time 2016/11/30 15:22 */ private String uriToFilePath(Uri uri) { //获取图片数据 String[] proj = {MediaStore.Images.Media.DATA}; //查询 Cursor cursor = managedQuery(uri, proj, null, null, null); //获得用户选择的图片的索引值 int image_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); cursor.moveToFirst(); //返回图片路径 return cursor.getString(image_index); } }
布局文件长这样：
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="16dp"> <Button android:id="@+id/take_photo_btn" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:gravity="center" android:text="拍照" android:textSize="16sp"/> <Button android:id="@+id/select_photo_btn" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:gravity="center" android:text="选择图片" android:textSize="16sp"/> <ImageView android:id="@+id/photo_iv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:layout_marginTop="20dp"/> </LinearLayout>
最后不要忘记在AndroidManifest.xml中添加UploadPicActivity及权限：
<uses-permission android:name="android.permission.CAMERA"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。